MEDIUM5.3
GO-2026-4300
Mattermost Server is vulnerable to DoS through maliciously crafted posts in github.com/mattermost/mattermost-server
Quick fix
GO-2026-4300 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v4.0.5+incompatibleDetails
Mattermost Server is vulnerable to DoS through maliciously crafted posts in github.com/mattermost/mattermost-server
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost-server
Introduced in:
0Fixed in: 4.0.5+incompatibleFix
go get github.com/mattermost/mattermost-server@v4.0.5+incompatibleReferences
- https://github.com/advisories/GHSA-9589-mq83-f749[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2017-18898[ADVISORY]
- https://github.com/grundleborg/mattermost/commit/5286318c72aa230f33f89df3b4cbdc33a0822a93[WEB]
- https://github.com/mattermost/mattermost/commit/5bf6f06c02c368b9c73a8be2d2d8795b3405b22b[WEB]
- https://github.com/mattermost/mattermost/commit/5c22176c963a7393241872073547f30083efe218[WEB]
- https://mattermost.com/security-updates[WEB]